International Journal of Academic Information Systems Research (IJAISR)   Year: 2020 | Volume: 4 | Issue: 7 | Page No.: 9-17 Development of Predictive Equation for Dispersion in Crude Oil Spill on Non - Navigable River Uche, Chikadibia K.A, Akor, Alexander J., Ayotamuno, Miebaka J., Amgbara, Tamunokuro O. Abstract: Oil spill into rivers and reservoirs is of great concern as the contamination of water bodies has a devastating and obnoxious effect on marine ecology and local water supply systems. Dispersion increases the superficial transfer area, favoring dissolution, biodegradation and sedimentation. The objective of this study is to develop predictive equation for the dispersion of crude oil spill on non-navigable rivers. The equation was developed using dimension analysis. The spilled oil parameters used in the analysis were: density and kinematic viscosity of crude oil. The coefficient used in the analysis is: manning's roughness coefficient. Non - navigable river parameters used were: velocity of flow/current and depth of flow. These parameters were obtained from standards published in journal papers in the field of oil spill modeling. Other parameters used were: the volume of oil spilled and time elapsed. The developed equation was validated against a reference mass loss equation for dispersion using the coefficient of determination R2 and percentage deviation. The equation predicted a dissolution loss of 0.7 percent of initial spill mass 24 hours after a spill. The developed predictive equation had R2 value of 0.99, which indicates a good fit of the equation. In addition, percentage deviation values of -10.04 between the predictive equation and reference equation indicate a good agreement between the two equations. The predictive equation will be useful in contingency planning, training, spill response and long - term damage assessment of oil spills in non-navigable rivers.